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Condensed Consolidated Balance Sheets (Unaudited) (USD $)
Sep. 30, 2012
Dec. 31, 2011
Current Assets:    
Cash and cash equivalents $ 1,306,506 $ 704,345
Certificates of deposit 6,056,282 5,880,000
Accounts receivable, net 5,453,193 [1] 4,398,426 [2]
Inventories, net 5,214,761 5,212,040
Deferred tax assets 422,191 420,191
Other current assets 365,899 347,737
Total current assets 18,818,832 16,962,739
Property, Plant and Equipment:    
Land 923,587 923,587
Land improvements 314,563 314,563
Buildings and improvements 6,188,535 6,169,545
Production equipment and other 29,266,900 28,785,896
Property, Plant and Equipment Gross 36,693,585 36,193,591
Less accumulated depreciation 28,961,678 28,298,066
Net property, plant and equipment 7,731,907 7,895,525
Total assets 26,550,739 24,858,264
Current Liabilities:    
Accounts payable 1,229,279 968,266
Accrued wages and salaries 847,726 374,964
Other accrued expenses 494,576 453,594
Unearned revenue and customer deposits 125,622 151,652
Total current liabilities 2,697,203 1,948,476
Deferred income taxes 766,275 785,275
Total liabilities 3,463,478 2,733,751
Shareholders' Equity:    
Preferred stock    [3]    [3]
Common stock 1,138,096 [4] 1,138,096 [4]
Additional paid-in capital 447,134 447,134
Retained earnings 25,424,129 24,461,381
Treasury stock (3,922,098) [5] (3,922,098) [5]
Total shareholders' equity 23,087,261 22,124,513
Total liabilities and shareholders' equity $ 26,550,739 $ 24,858,264
[1] Net of allowance of $150,000.
[2] Net of allowance of $140,000.
[3] No par value, 500,000 shares authorized, none outstanding.
[4] $1.00 par value, 4,000,000 shares authorized, 1,138,096 shares issued, 966,132 shares outstanding.
[5] At cost, 171,964 shares.